Badman owned a V3 and every link he landed you could hear the frame pop back into shape.
He ended up ripping the whole thing in two one day, right along the CS/ST welds on the seat tube.
Personally i've never experienced this and ive never snapped a frame. Ive never felt a frame flex either. Wheels, yes, but not a frame.
Id also be pissed if a frame snapped after one year. Frames should last indefinatly. If youre finding frames are only lasting you a year, theres somthing wrong with your riding technique that you need to address.